- Default share is now called "mytardis-webdav", and its default directory
  is /opt/mytardis/current/var/store
- Removed test users from wsgidav.conf.  Users will be added dynamically
  by wsgi/http_authenticator as needed.  (See
  http_authenticator.authBasicAuthRequest.)
- Disabled digest authentication.  Basic authentication is required for
  authenticating against a database or LDAP directory etc.  Note that
  https (SSL) should be used with basic authentication.